| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the drift between each UPS and the next due to the nonconformity, caused by its installation environment, between a synchronous control signal that a synchronous control signal generating circuit has transmitted and a synchronous control signal that the side of each UPS has received, in a parallel UPS system which operates two or more UPSs in parallel. <P>SOLUTION: The parallel UPS system, which is equipped with two or more UPSs 11 and 12 which are operated in parallel synchronously, being supplied with synchronous control signals via electric cables 41 and 42, has a distortion removal system 5 which straddles both of the transmission side and the reception side of the above synchronous control signals so as to remove distortion which arises on the reception side of the above synchronous control signal, resulting from the above electric cable. This UPS system supplies the inverters 105 in the above UPSs 11 and 12 with synchronous control signals with their distortion removed by this distortion removal system. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
